6 questions from past BPSC papers, each with the correct answer and an
explanation of why. This is a Bihar-specific topic, which BPSC returns to more often than a general UPSC-style syllabus would suggest. Free to read — no signup.
Why: Son — rises Amarkantak (MP); joins Ganga at Maner (Patna).
69th Pre · 2023
Sonepur Mela is held at the confluence of Ganga and:
Kosi
Gandak
Son
Punpun
Why: Asia's largest cattle fair; Kartik Purnima.
70th Re-Exam · 2025
Which river is known as "Sorrow of Bihar"?
Son
Gandak
Kosi
Ganga
Why: Kosi causes recurrent floods.
67th Pre · 2022
Which is Asia's largest freshwater oxbow lake in Bihar?
Kanwar Lake
Anupam Lake
Kusheshwar Lake
Ghogha Lake
Why: Kanwar Lake (Begusarai).
68th Pre · 2023
Phalgu sacred river of Bihar formed by confluence of which rivers?
Mohana and Lilajan
Lilajan and Son
Son and Mohana
Lilajan and Niranjana
Why: Mohana and Lilajan rivers.
Mains-style questions on this topic
Descriptive questions from past papers. There is no single correct option — practise
writing the answer, then check your structure against the syllabus.
67th Mains GS-2 · 2022
Why is Kosi called the Sorrow of Bihar? Suggest measures to control its floods.
Study these topics in order, and remember them
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interview, and 19 Bihar-specific topics — 94 chapters in reading order, each with a brief
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